The molecule is thiophosgene or CSCl₂.
Step-by-step explanation:
As the informations given, the molecule contains 12.17 grams of carbon, 32.53 g of sulfur, and 72.19 g of chlorine.
Molar mass of carbon =12.
Molar mass of sulphur =32.
Molar mass of chlorine =35.
So on an average estimation, one mole of the molecule contains one mole of carbon atoms, one mole of Sulphur atoms and two moles of chlorine atoms. Molar mass of an element is the average weight of one mole of atoms of that element which is made average according to the variations of percentage availability of isotopes of that element on earth.
So the estimated molecule is CSCl₂ or thiophosgene.